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Comprehensive utilization system and method of metallurgical solid wastes

A solid waste and metallurgical technology, applied in the field of comprehensive utilization of metallurgical solid waste, can solve the problems of poor dust treatment effect of metallurgical solid waste, unsatisfactory treatment effect, low resource utilization rate, etc., to reduce difficulty, reduce energy consumption, The effect of increasing the contact area

Active Publication Date: 2020-04-28
唐山鹤兴废料综合利用科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production process only removes zinc from metallurgical solid waste dust into the flue gas, and does not remove and collect potassium, sodium and other elements, resulting in the presence of potassium, sodium and other alkali metal elements in the metallurgical waste dust. In solid waste dust, the treatment effect is not ideal and the resource utilization rate is low
[0005] Therefore, it is an urgent problem for those skilled in the art to provide a treatment method for metallurgical solid waste to solve the phenomenon of poor metallurgical solid waste dust treatment effect and low resource utilization rate.

Method used

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  • Comprehensive utilization system and method of metallurgical solid wastes
  • Comprehensive utilization system and method of metallurgical solid wastes

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Effect test

Embodiment 1

[0050] A comprehensive utilization system for metallurgical solid waste, including an oxidation gasification unit, a reduction gasification unit, a power generation unit and a displacement separation unit;

[0051] The oxidation gasification unit includes an oxidation gasification kiln, a first cyclone flue gas magnetization device and a first high-temperature bag filter, and the flue gas of the oxidation gasification kiln passes through the first cyclone flue gas magnetization device and the first cyclone flue gas magnetization device. A high-temperature bag filter, the outlet of the first high-temperature bag filter communicates with the displacement separation unit, and the outlet of the oxidation gasification kiln communicates with the reduction gasification unit through a belt conveyor;

[0052] The reduction gasification unit includes a reduction gasification furnace, a second cyclone flue gas magnetization device and a second high temperature bag filter; the top of the r...

Embodiment 2

[0063] Embodiment 2 of the present invention discloses a comprehensive utilization method of metallurgical solid waste, which specifically includes the following steps:

[0064] (1) Metallurgical solid waste is sent to the oxidation gasification kiln, the oxygen content of the atmosphere inside the oxidation gasification kiln is 16%, the oxidation gasification temperature is controlled at 1350 ° C, and the gasification oxidation enrichment is obtained to obtain potassium-sodium-silver mixed dust (potassium-sodium-silver mixed dust) Dust K element content 50%) and iron-containing slag;

[0065] (2) Break the iron-containing slag into 25mm pellets, and send some coke into the reduction gasifier. The mass ratio of slag-containing iron and coke is 2.5:1. The reduction gasification temperature is controlled at 1580°C, and the gasification reduction enrichment Obtain zinc-indium mixed dust (Zn element content of zinc-indium mixed dust is 55%), molten iron, rare metal alloy and silic...

Embodiment 3

[0070] Embodiment 3 of the present invention discloses a comprehensive utilization method of metallurgical solid waste, which specifically includes the following steps:

[0071] (1) Metallurgical solid waste is sent to the oxidation gasification kiln, the oxygen content of the atmosphere inside the oxidation gasification kiln is 17%, the oxidation gasification temperature is controlled at 1550 ° C, and the gasification oxidation enrichment is obtained to obtain potassium-sodium-silver mixed dust (potassium-sodium-silver mixed dust) Dust K element content 52%) and iron-containing slag;

[0072] (2) Break the iron-containing slag into 25mm pellets, and send part of the coke to the reduction gasifier. The mass ratio of slag-containing iron and coke is 2.5:1. Obtain zinc-indium mixed dust (zinc-indium mixed dust Zn element content 45%), molten iron, rare metal alloy and silicate slag;

[0073] (3) The exhaust gas from the reduction gasifier (the calorific value of the exhaust gas...

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Abstract

The invention discloses a comprehensive utilization system and method of metallurgical solid wastes, wherein the metallurgical solid wastes (such as metallurgical production environment fly ash, sintering dust, pellet dust, blast furnace dust, converter dust mud, electric furnace dust mud, steel slag, and steel rolling dust mud solid wastes) are taken as main raw materials, and Fe, K, Na, Zn, CaO,SiO2, S, MgO, Al2O3 and other elements in the metallurgical solid wastes are extracted through coupled integrated comprehensive utilization of oxidative gasification enrichment, reductive gasification enrichment and separation by displacement. According to the comprehensive utilization system and method, the comprehensive utilization of the metallurgical solid wastes is realized in a real sense,and the cascade graded enrichment and separation as well as full-element extraction of the metallurgical solid wastes are achieved. The integral method is simple and efficient, and industrial production can be easily achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and more specifically relates to a comprehensive utilization method of metallurgical solid waste. Background technique [0002] Traditional iron and steel enterprises will produce a large amount of metallurgical solid waste dust, scale and slag during sintering, pelletizing, ironmaking, steelmaking and steel rolling, accounting for more than 10% of the total steel output, which contains a large amount of iron and zinc , Potassium, sodium, lead, silver, indium and other rare and precious metals have high recycling value. [0003] At present, the most important recycling method for metallurgical solid waste is to return it to sintering as an ingredient, but this method has obvious defects. Due to the large difference between the physical parameters of metallurgical solid waste and ore powder raw materials, it has great impact on the production technical indicators and product quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B11/00C22B19/30C22B26/10C22B58/00
CPCC22B7/02C22B7/001C22B7/006C22B11/023C22B11/044C22B19/30C22B58/00C22B26/10Y02P10/20
Inventor 王俊英班友合王旭民王志刚王锦程何汉兵宋昌顺王丽莉吴慧敏李海涛
Owner 唐山鹤兴废料综合利用科技有限公司
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